JPH02183106A - Method and apparatus for inspecting bent end of object - Google Patents

Method and apparatus for inspecting bent end of object

Info

Publication number
JPH02183106A
JPH02183106A JP1303051A JP30305189A JPH02183106A JP H02183106 A JPH02183106 A JP H02183106A JP 1303051 A JP1303051 A JP 1303051A JP 30305189 A JP30305189 A JP 30305189A JP H02183106 A JPH02183106 A JP H02183106A
Authority
JP
Japan
Prior art keywords
zone
edge
inspected
reflected image
light source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP1303051A
Other languages
Japanese (ja)
Other versions
JP2839594B2 (en
Inventor
Nicholaas C Swart
ニコラス・コルネリス・スワート
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heuft Qualiplus BV
Original Assignee
Heuft Qualiplus BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heuft Qualiplus BV filed Critical Heuft Qualiplus BV
Publication of JPH02183106A publication Critical patent/JPH02183106A/en
Application granted granted Critical
Publication of JP2839594B2 publication Critical patent/JP2839594B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/90—Investigating the presence of flaws or contamination in a container or its contents
    • G01N21/909—Investigating the presence of flaws or contamination in a container or its contents in opaque containers or opaque container parts, e.g. cans, tins, caps, labels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
    • G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/10—Scanning
    • G01N2201/102—Video camera

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  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Image Analysis (AREA)
  • Image Processing (AREA)

Abstract

PURPOSE: To make it possible to increase the accuracy of sensing by comparing the shape of the reflected image decided by the shade of the end of an object illuminated to satisfy the standard with that of the reflected image of the end of the object to be inspected and generating a reject signal if the detected difference is out of the allowable range. CONSTITUTION: An object to be inspected in the first step is prepared, and an optical beam is directed to the zone of the bent end of the object at an incident angle to generate the shape in the zone of the end in the second step. In the third step, in the case of the object to satisfy the predetermined standard, the shape of the reflected image decided by the shade of the zone of the illuminated end is previously decided. In the four step, the reflected image of the zone of the object to be inspected is decided. In the fifth step, the result of the third step is compared with the result of the fourth step, a reject signal is generated if the compared difference is out of the allowable range previously selected.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、対象物の曲がった端を検査するための方法及
び装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method and a device for inspecting bent edges of objects.

（発明の目的） 本発明の目的は、たとえば円盤状の対象物の曲がった端
、例えば密封化合物のためのガター（溝）を境界とする
金属のリッドの環状の端、を検査するための方法及び装
置を提供することである。OBJECTS OF THE INVENTION It is an object of the invention to provide a method for inspecting curved edges of objects, e.g. disc-shaped objects, e.g. the annular end of a metal lid bounded by a gutter for a sealing compound. and equipment.

（発明の構成） 本発明に係る対象物の曲がった端を検査するための方法
は、（ａ）検査するべき対象物を用意するステップと、
（ｂ）その対象物の端のゾーンの中に上記の曲がった端
が陰を生じるような入射角で、対象物の端のゾーンに光
ビームを向けるステップと、＜、ｃ　＞あらかじめ定め
た標準を満足する対象物の場合に、上記の照らされた端
のゾーンの上記の陰によって決定される反射像の形状を
前以て決定するステップと、（ｄ）検査するべき対象物
の端のゾーンの反射像を決定するステ、プと、（ｅ）ス
テップ（ｃ）の結果とステップ（ｄ）の結果を比較し、
検出された差が前以て選択された許容範囲外にある場合
、拒絶信号を発生するステップとからなる。(Structure of the Invention) A method for inspecting a bent end of an object according to the present invention includes the steps of: (a) preparing an object to be inspected;
(b) directing a light beam into the edge zone of the object at an angle of incidence such that said curved edge casts a shadow in the edge zone of that object; and <,c> a predetermined standard. (d) predetermining the shape of a reflected image determined by said shade of said illuminated edge zone in the case of an object satisfying said edge zone of the object to be inspected; (e) comparing the results of step (c) and step (d);
generating a rejection signal if the detected difference is outside a preselected tolerance range.

本発明に係る対象物の曲がった端を検査するための方法
を実行するための装置は、（ａ）光源、（ｂ）曲がった
端が端のゾーンに陰を生じるように上記の光源によって
出射された光ビームをこの端のゾーンに回けるための指
向手段、（ｃ）あらかじめ決定された標準を満足する対
象物の場合に、上記の陰によって決定された照らされた
端のゾーンの反射像の形状を格納するための記憶手段、
（ｄ）検査されるべき対象物の端のゾーンの反射像を決
定する検知手段、および（ｅ）検知手段の出力信号と記
憶手段の出力信号を比較し、検出された差が選択された
許容範囲外にある場合に拒絶信号を発生する比較手段か
らなる。A device for carrying out the method for inspecting bent edges of objects according to the invention comprises: (a) a light source; (b) a light source emitted by said light source in such a way that the bent edge casts a shadow in the zone of the edge; (c) a reflected image of the illuminated end zone determined by said shade in the case of an object satisfying a predetermined standard; a memory means for storing the shape of
(d) sensing means for determining the reflected image of the edge zone of the object to be inspected; and (e) comparing the output signal of the sensing means and the output signal of the storage means, the detected difference being within a selected tolerance. It consists of a comparison means which generates a rejection signal if it is out of range.

（実施例） 以下、添付の図面を参照して本発明の詳細な説明をする
。(Example) Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

第１図は、ストロボスコープランプ２と、それに結合さ
れた円錐状の光案内部３とからなる光源ｌを示す。この
円錐状の光案内部３の光出射端面４はつや消しであり、
強い環状の光源を形成する。FIG. 1 shows a light source l consisting of a stroboscopic lamp 2 and a conical light guide 3 coupled thereto. The light emitting end surface 4 of this conical light guide section 3 is matte,
Forms a strong annular light source.

環状の光出射端面の縁の内部では、黒いスフＩＪ　−ン
が配置される。この光源の構成については、未公開のオ
ランダ国特許出願第８８００８６６号に開示されている
。Inside the edge of the annular light emitting end surface, a black suffix IJ - is arranged. The construction of this light source is disclosed in unpublished Dutch Patent Application No. 8800866.

環状の光源４によって出射される光は、検査されるべき
リッド６に、特にリッド６の環状のガター７に投射され
る。このために、投射レンズ８と、ミラー９と、第１の
円錐状ミラー１１が設けられる。このミラー９は、円形
の水平な投影を有する楕円形の穴を備える。The light emitted by the annular light source 4 is projected onto the lid 6 to be inspected, in particular onto the annular gutter 7 of the lid 6. For this purpose, a projection lens 8, a mirror 9 and a first conical mirror 11 are provided. This mirror 9 comprises an oval hole with a circular horizontal projection.

ガター７は、第２図に特に示されるように、直立した外
側の端８を備える。その結果、陰がカター７の底に形成
される。この陰のゾーンは、第２図で参照番号９で示さ
れる。Gutter 7 has an upright outer edge 8, as particularly shown in FIG. As a result, a shadow is formed at the bottom of the cutter 7. This shaded zone is indicated by reference numeral 9 in FIG.

もしガター７の立っている端８の一部が欠けていれば、
陰のゾーンは、より小さくなる。ビデオカメラ１０は、
ミラー９の中の楕円状の穴２０を介してガター７を検知
する。カメラｌＯによって取り上げられた画像を見る観
測者は、もしガター７の立っている端８が局所的に差を
示さなければ、はとんど又は全く環状のガターを見るこ
とが出来なくなった。その結果、ガター７は、照らされ
た部分を示す。If part of the standing end 8 of the gutter 7 is missing,
The shadow zone becomes smaller. The video camera 10 is
The gutter 7 is detected through the oval hole 20 in the mirror 9. An observer looking at the image picked up by the camera IO could hardly or never see the annular gutter if the standing edge 8 of the gutter 7 showed no local differences. As a result, the gutter 7 shows an illuminated part.

第２の円錐状のミラー１２を用いることにより、照らさ
れた部分は、かなり増大された輝度で観測され、検知の
信頼性に寄与する。２つのミラーｌ１１１２は、フロス
ト−コニカル（ｆｒｏｓｔ。By using the second conical mirror 12, the illuminated part is observed with a significantly increased brightness, contributing to the reliability of the detection. The two mirrors 1112 are frost-conical.

−ｃａｎ　ｉｃａ　１）であり、ミラー１１は内側に反
射し、ミラー１２は外側に反射する。-can ica 1), mirror 11 reflects inward and mirror 12 reflects outward.

光学部品１．８．９．１０．１１．１２を安全に保護す
るために、検査窓として役立つガラス板１４を備えた閉
じた囲い１３か用いられる。ミラー１１と１２は、この
ガラス阪１４上に配置される。ガラス板」４を通してガ
ター７の照射と観測が生じる。To safely protect the optical components 1.8.9.10.11.12, a closed enclosure 13 with a glass plate 14 serving as an inspection window is used. Mirrors 11 and 12 are arranged on this glass plate 14. Illumination and observation of the gutter 7 occurs through the glass plate 4.

図示されないが、輸送又は搬送手段か、下ガラス坂４上
に検査すべき一連のリッド６を順次搬送する。第１図に
示す正しい検査位置上にリッドが存在すると、例えば近
接スイッチなどによりフラッシュランプ２をトリが−で
き、そのため、正しい瞬間にビデオカメラ■０は希望の
像を検知できる。Although not shown, a series of lids 6 to be inspected are sequentially conveyed onto the lower glass slope 4 by means of transport or conveyance. When the lid is in the correct inspection position as shown in FIG. 1, the flash lamp 2 can be triggered, for example by a proximity switch, so that the video camera 0 can detect the desired image at the correct moment.

第３図は、別の実施例を示す。ここで用いられる第３の
円錐状のミラー１５は、第１図によるミラー１２に機能
的に対応する円錐状のミラー１６を介してガターの環状
像を−まとめにさせる。この配置により光学的拡大が達
成され、その結果、観測の分解能が実質的に増大でき、
検知の正確さが増大できる。FIG. 3 shows another embodiment. A third conical mirror 15 used here brings together the annular image of the gutter via a conical mirror 16, which corresponds functionally to the mirror 12 according to FIG. This arrangement achieves optical magnification, so that the resolution of observations can be substantially increased,
Detection accuracy can be increased.

ビデオカメラｌＯからくるビデオ信号が、信号処理ユニ
ット１７に供給される。この信号処理ユニット１７は、
もし希望なら出力１８を通して投射手段を調節できる。A video signal coming from a video camera IO is supplied to a signal processing unit 17. This signal processing unit 17 is
The projection means can be adjusted via output 18 if desired.

この信号処理ユニット１７は、反射像の形状を格納でき
る記憶手段を備える。This signal processing unit 17 includes a storage means that can store the shape of the reflected image.

この反射像の形状は、また、あらかじめ決定された標準
を満足するリッドの場合、リットの照らされた端のゾー
ンの、第２図による陰によってまた決定される。信号処
理ユニット１７の一部をなす比較手段によって、比較が
、ビデオカメラ１０の出力信号と記憶手段の内容とにつ
いてなされる。The shape of this reflected image is also determined, in the case of lids satisfying predetermined standards, by the shading according to FIG. 2 of the illuminated end zone of the lid. By comparison means forming part of the signal processing unit 17, a comparison is made between the output signal of the video camera 10 and the contents of the storage means.

検知された差が選択された許容範囲外にある場合、排出
信号が出力Ｉ８を介して供給される。この場合、関連す
るリッドは、例えば、上に説明した図示しない排出手段
により、搬送される対象物の流れから排出される。注意
するべきことに、連続的な照射も使用できる。この場合
、ビデオカメラのトリガーは、対象物が正しい検知位置
に位置した時に起こる。If the detected difference is outside the selected tolerance range, an ejection signal is provided via output I8. In this case, the associated lid is ejected from the stream of conveyed objects, for example by means of the ejector means (not shown) described above. Of note, continuous irradiation can also be used. In this case, the triggering of the video camera occurs when the object is located at the correct sensing position.

更に、明らかなように、光源１の光出射端４の形状は、
必ずしも常に円くある必要はなく、一般に検査される対
象物の端のゾーンの、任意の希望の形状に適合できる。Furthermore, as is clear, the shape of the light emitting end 4 of the light source 1 is as follows:
It does not necessarily always have to be round, but can generally adapt to any desired shape of the edge zone of the object being inspected.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、本発明の装置の第１実施例の図式的な図であ
る。 第２図は、第１図のＩＩの詳細図である。 第３図は、別の実施例の詳細図である。 １・・・光源、　６・・・リッド、　７・・・ガター９
・・・ミラー　　１０・・・ビデオカメラ、１１．１２
．１５．１６・・・円錐状ミラー１７・・・信号処理ユ
ニット。FIG. 1 is a schematic illustration of a first embodiment of the device according to the invention. FIG. 2 is a detailed view of II in FIG. FIG. 3 is a detailed view of another embodiment. 1...Light source, 6...Lid, 7...Gutter 9
...Mirror 10...Video camera, 11.12
．． 15.16... Conical mirror 17... Signal processing unit.

Claims (7)

【特許請求の範囲】[Claims] （１）対象物の曲がった端を検査するための方法におい
て、 （ａ）検査するべき対象物を用意するステップと、 （ｂ）その対象物の端のゾーンの中に上記の曲がった端
が陰を生じるような入射角で、対象物の端のゾーンに光
ビームを向けるステップと、（ｃ）あらかじめ定めた標
準を満足する対象物の場合に、上記の照らされた端のゾ
ーンの上記の陰によって決定される反射像の形状を前以
て決定するステップと、 （ｄ）検査するべき対象物の端のゾーンの反射像を決定
するステップと、 （ｅ）ステップ（ｃ）の結果とステップ（ｄ）の結果を
比較し、検出された差が前以て選択された許容範囲外に
ある場合、拒絶信号を発生するステップとからなる対象
物の曲がった端の検査方法。(1) A method for inspecting a bent edge of an object, comprising the steps of: (a) providing an object to be inspected; (c) directing a light beam into an edge zone of said object at an angle of incidence such as to produce a shadow; (d) determining the reflected image of an edge zone of the object to be inspected; (e) the result of step (c); (d) comparing the results of (d) and generating a rejection signal if the detected difference is outside a preselected tolerance range. （２）ステップ（ｄ）をビデオカメラによって実行する
ことを特徴とする請求項１に記載された方法。2. The method of claim 1, wherein step (d) is performed by a video camera. （３）請求項１または請求項２に係る対象物の曲がった
端を検査するための方法を実行するための装置において
、 （ａ）光源、 （ｂ）曲がった端が端のゾーンに陰を生じるように上記
の光源によって出射された光ビームをこの端のゾーンに
向けるための指向手段、 （ｃ）あらかじめ決定された標準を満足する対象物の場
合に、上記の陰によって決定された照らされた端のゾー
ンの反射像の形状を格納するための記憶手段、 （ｄ）検査されるべき対象物の端のゾーンの反射像を決
定する検知手段、および （ｅ）検知手段の出力信号と記憶手段の出力信号を比較
し、検出された差が選択された許容範囲外にある場合に
拒絶信号を発生する比較手段からなる検査装置。(3) A device for carrying out a method for inspecting a curved edge of an object according to claim 1 or claim 2, comprising: (a) a light source; (b) the curved edge shades the edge zone; (c) directing means for directing the light beam emitted by said light source to this end zone so as to result in an illumination determined by said shade in the case of an object satisfying a predetermined standard; (d) detection means for determining the reflection image of the edge zone of the object to be inspected; and (e) an output signal and storage of the detection means. A test device comprising comparing means for comparing the output signals of the means and generating a rejection signal if the detected difference is outside a selected tolerance range. （４）光源が端のゾーンだけを照らすように設けられて
いることを特徴とする請求項３に記載された検査装置。(4) An inspection device according to claim 3, characterized in that the light source is provided to illuminate only the edge zones. （５）対象物が環状の端を備え、検出手段が環状の第１
の円錐状ミラーからなることを特徴とする請求項４に記
載された検査装置。(5) The object has an annular end, and the detection means has an annular first end.
5. The inspection device according to claim 4, comprising a conical mirror. （６）対象物の上に位置され、検知装置上に反射像を向
ける第２の円錐状ミラーが備えられることを特徴とする
請求項３から請求項５までのいずれか１項に記載された
検査装置。(6) A second conical mirror is provided which is positioned above the object and directs the reflected image onto the detection device. Inspection equipment. （７）上記の第２の円錐状のミラー上に反射像を向ける
第３の円錐状ミラーを備えることを特徴とする請求項６
に記載された検査装置。(7) Claim 6, further comprising a third conical mirror that directs a reflected image onto the second conical mirror.
Inspection equipment described in .
JP1303051A 1988-11-21 1989-11-21 Inspection device for bent end of object Expired - Fee Related JP2839594B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8802869 1988-11-21
NL8802869 1988-11-21

Publications (2)

Publication Number Publication Date
JPH02183106A true JPH02183106A (en) 1990-07-17
JP2839594B2 JP2839594B2 (en) 1998-12-16

Family

ID=19853262

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1303051A Expired - Fee Related JP2839594B2 (en) 1988-11-21 1989-11-21 Inspection device for bent end of object

Country Status (8)

Country Link
US (1) US5004347A (en)
EP (1) EP0370570B1 (en)
JP (1) JP2839594B2 (en)
AU (1) AU627796B2 (en)
CA (1) CA2003335A1 (en)
DE (1) DE68908351T2 (en)
DK (1) DK585189A (en)
ES (1) ES2042981T3 (en)

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CN110238082B (en) * 2019-06-26 2021-06-04 东莞理工学院 3C product shell detects screening equipment

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US20180188184A1 (en) * 2015-08-26 2018-07-05 Abb Schweiz Ag Object multi-perspective inspection apparatus and method therefor
US10488346B2 (en) * 2015-08-26 2019-11-26 Abb Schweiz Ag Object multi-perspective inspection apparatus and method therefor
US10788429B2 (en) 2015-08-26 2020-09-29 Abb Schweiz Ag Object multi-perspective inspection apparatus and method therefor

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ES2042981T3 (en) 1993-12-16
AU4539889A (en) 1990-05-24
EP0370570A1 (en) 1990-05-30
DK585189A (en) 1990-05-22
US5004347A (en) 1991-04-02
DE68908351D1 (en) 1993-09-16
AU627796B2 (en) 1992-09-03
JP2839594B2 (en) 1998-12-16
DE68908351T2 (en) 1993-12-02
CA2003335A1 (en) 1990-05-21
DK585189D0 (en) 1989-11-21
EP0370570B1 (en) 1993-08-11

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